I will sometimes do this sous vide but only if the meat is somewhat higher quality, like a USDA Prime chuck or sirloin (anything better is wasted by grinding it), and I had it ground by the butcher from a single cut in my sight.
You can even be sure you're safe at 130F if you spend two hours on it.
I've done this maybe four or five times, mostly because it's a lot easier just to grill them and there isn't a kind of ground meat that isn't just fine well done.
Usually burger meat ground twice is enough, but as with ground beef you still have some connective tissue, sinews etc, so it's not really nice to eat rare. Instead of a big rare patty, i like multiple smashed thin ones, specially if with cheese between then, assembled while still in the griddle
Funny you mentioning sous vide, because earlier i was thinking to myself if sous vide meatballs are a good idea, but i think it's probably not
This is a factor in why I like my steaks at medium; the texture of a rarer cut just intrinsically bothers me; it's not tender to me but usually chewy, which I find repellant. When it's a bit firmer and done, I find it a good compromise between crust, browning, and a bit of juiciness. I also don't mind them well done tbh.
I think getting a steak to a perfect medium is way harder then people make it out to be. I hear this trick of guiding the texture checking if it's similar than the fatty part of your palm, from fucking Gordon Ramsay to my own chefs, but i think it's bullshit
One of my chefs is chubby, i'm a slender man, our hands have different fatty densities, so it's a weird compass. A sous vide is perfect to get the perfect "doneness" but it's not really practical as not everyone has such equipment or the patience to wait while the sous vide does its thing
Having it at room temp (you can get away with it a little chilly but never refrigerator cold) before the sear will garantee quick crust as there's no "wall" of steam between meat and pan when heat transfering, so you get maillard quickly without overcooking the interior of the steak
Cutting it can make it rubbery if you don't cut against the grain too, so knifework plays a part too